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What are refractory materials?...

What are refractory materials?

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### Step-by-Step Text Solution 1. **Definition of Refractory Materials**: Refractory materials are defined as substances that are resistant to decomposition when subjected to high temperatures, pressure, or chemical attack. 2. **Properties of Refractory Materials**: These materials retain their strength and structural integrity even at elevated temperatures, meaning they do not melt or become soft under heat. ...
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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (VERY SHORT ANSWER QUESTIONS)
  1. Which reducing agent is used to reduce the oxides of less electroposit...

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  2. Which kind of ores undergo self reduction ?

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  3. What are refractory materials?

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  4. Why is MgO used for lining the inner surface of the furnace?

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  5. Indicate the temperature at which carbon can be used as a reducing age...

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  6. How would you purify a metal like Copper?

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  7. Name the purification method which involves vapour phase extraction.

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  8. Ultra pure silicon is needed by electronic industry. By which method o...

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  9. Name the three main varieties of iron. Which out of them is the purest...

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  10. What is the percentage of carbon in steel?

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  11. A crude metal is heated with iodine to form metal tetraiodide which is...

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  12. What is the principle of chromatographic separation ?

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  13. Name the most important ore of aluminium.

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  14. When bauxite ore contains considerable amount of silica as an impurity...

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  15. Name two alloys of aluminium and give their composition.

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  16. What is the composition of ignition mixture used in aluminothermy?

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  17. Which process is used to convert pure alumina into aluminium.

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  18. Why cryolite is mixed with alumina during its electrolysis?

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  19. What is the purpose of adding a small amount of CaF2 to alumina during...

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  20. Why aluminium acts as a good reducing agent?

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